AMERICAN DIPTERA. 307 



reaches only one-third way to margin. Length, 5.0 mm. ; wings, 

 5.5 mm." 



Type. — Black Mountain, N. C. ; North Fork Swannanoa, 

 May {coll. Banks). 



I submit the following : Metanotum hardly grayish ; scu- 

 tellum black, subopake ; the short hairs of abdomen white ; 

 the abdominal punctures very fine and in some parts are not 

 perceptible ; lateral and ventral margins of all segments 

 densely cinereous ; fifth segment longer than fourth ; hypo- 

 pygium (Fig. 76) as long as fourth and about half as broad 

 as fifth, brownish tinged ; intermediate lobe narrowly visi- 

 ble ; ventral lobe yellowish ; middle femora with a short 

 series of black spines on posterior surface near apex, and a 

 similar series is also discernable on the fore femora, other- 

 wise the femora are strongly spinose below ; post tibiae with 

 2-3 long black hairs outside at middle; apical and basal 

 tarsal joints in proportion of 1:3; wings have a slight brown- 

 ish tinge ; stigma equalling fourth section. 



This species is very near elezantulus Williston, from 

 Mexico. The only difference seems to be in the non-pilosity 

 of the mesonotum and the lighter femora. The basal and 

 apical constriction of the abdominal segments in this species 

 is very noticeable, as are also the posterior series of spines 

 on the middle femora. 



32. P. luteicornis n. sp. 



9 . Front, face and occiput white ; vertex with only ocellar tubercle 

 shining black. Antennas, proboscis and palpi yellow; second joint of 

 former brown ; third acute (Fig. 20), arista black. Thorax cinereous, 

 mesonotum more shining, brown pollinose medianly, short pubescent. 

 Scutellum shining ; humeri and halteres yellow. Abdomen subcylindri- 

 cal, but broadest at fifth segment ; all segments subequal in length, 

 shining, except first and lateral angles of following cinereous ; lateral 

 apical margins of 2-5 with faint yellow tinge. Ovipositor yellow, 

 moderately slender, extending to second ventral segment, straight or 

 slightly curved down, somewhat longer than its elongo-globose, shin- 

 ing black base (Fig. 116). Legs yellow, except coxae and broad 

 femoral ring, black, the line of demarcation between yellow and black 

 very pronounced (Fig. 122) ; one surface of femora polished ; flexor 

 spines distinct. Wings grayish tinged, with colored stigma (Fig. 

 173). Length, 3.8 mm. ; wings, 3.8 mm. 



TRANS. AM. ENT. SOC, XXXVI. (*39) JANUARY, 1911. 



